Why is Guangdong getting colder and colder?

The statistical results of temperature data in Guangdong Province in recent 50 years show that the surface temperature increase rate in Guangdong Province is 0. 16℃/ 10 years, which is lower than the national and global surface temperature increase rates. The temporal and spatial characteristics of climate warming are as follows: winter and spring are obviously larger than summer and autumn, coastal areas are obviously larger than inland areas, and the climate zone is obviously moving northward, while the area of the north tropical zone is expanding, the area of the south subtropical zone is shrinking, and the area of the middle subtropical zone is relatively stable. The analysis shows that under the background of global warming, Guangdong's climate warming has local characteristics, which are mainly influenced by atmospheric circulation, sea temperature and human activities. [